Canon listed his priorities as "good-paying jobs, a safe place to live, quality, affordable education and healthcare that doesn't leave us bankrupt" in a press release.

"These are things that matter most to regular people. But our current representative isn't working on those issues," Canon said in the release. "He's an opportunistic multi-millionaire who came to Indiana just to buy a seat in Congress."

Canon is the third known challenger to Hollingsworth, joining orthodontist and small business owner Tod Curtis, of Bedford, who announced his run last week, and Tom Pappas, an Indiana University associate instructor. All three are running as Democrats.

Rob Burgess, Hollingsworth's spokesman, declined to comment on the candidates.

Trey Hollingsworth
Trey Hollingsworth(Photo: Provided photo.)

The Hoosier state's 9th District stretches across parts of south-central and southeastern Indiana. It includes the Indiana side of the Louisville Metropolitan area, as well as Greenwood and Bloomington.

The last Democrat to win the district was Baron Hill, who left office in 2011 after he was defeated by now-Indiana Senator Todd Young. Young won elections in 2010, 2012 and 2014. He garnered more than 60 percent of the district's votes in 2014.

Hollingsworth, who was born in Tennessee and moved to Indiana prior to announcing his run in 2015, defeated Democrat Shelli Yoder by 14 percentage points in 2016.

The 9th District had not been added to the Democratic Congressional Campaign Committee’s list of districts where they're looking to invest in challengers, as of May. A spokesman for the committee did not immediately respond to a request for comment.

“He's an opportunistic multi-millionaire who came to Indiana just to buy a seat in Congress.”

Dan Canon, on Rep. Trey Hollingsworth

However, according to the Indianapolis Star, both Curtis and Pappas have pledged to run on health care-related platforms, potentially signaling that Democrats think the politics of health care are turning in their favor.

Curtis said his top concern is making sure Hoosiers with pre-existing conditions can afford quality care. Pappas' platform includes allowing every American to have the choice of a public health insurance option.

Canon, who is active on Twitter, also said that he's campaigning on the idea of universal health care "of some type."

Canon has been outspoken against President Donald Trump on Twitter, saying in one tweet that "history will show Trump was the damndest (sic) mistake we ever made, but I'm developing genuine hope that it's a catalyst for positive change." He is one of the plaintiff attorneys in a suit against Trump, in which three people claim they were assaulted by audience members while protesting a speech during a Trump campaign visit to Louisville.